tragacanth


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Related to tragacanth: agar, guar gum

tragacanth

(trăg`əkănth) or

gum tragacanth,

gummy exudation from the leguminous shrub Astragalus gummifer and related pulsepulse,
in botany, common name for members of the Fabaceae (Leguminosae), a large plant family, called also the pea, or legume, family. Numbering about 650 genera and 17,000 species, the family is third largest, after the asters and the orchids.
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 family plants of SE Europe and W Asia. It is obtained through incisions in the stem of the plant. The gum is produced chiefly in Iran. Tragacanth is almost insoluble in water but swells in it to form a stiff gel. It is used as an emulsifying agent, as a component of pills, hand lotions, and medicinal lubricating jellies, as a demulcent, and as a sizing material. A gum (sometimes called Indian tragacanth) from a plant of the sterculiasterculia
, common name for some members of the Sterculiaceae, a family of herbs, shrubs, and trees of tropical and subtropical regions. The most important members of the family are the cacao, source of cocoa and chocolate, and the cola, the caffeine-rich seeds of which are used
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 family is sold as a cheaper substitute. See gumgum,
term commonly applied to any of a wide variety of colloidal substances somewhat similar in appearance and general characteristics, exuded by or extracted from plants.
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tragacanth

[′traj·ə‚kanth]
(materials)
The gummy exudate produced by certain Asiatic species of Astragalus ; consists of a soluble portion containing uronic acid and arabinose, and an insoluble portion that absorbs water and swells to make a stiff opalescent mucilage.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The Raman spectrum of Arabic gum shows a doublet at around 850 [cm.sup.-1] (882 [cm.sup.-1] and 841 [cm.sup.-1]), whereas tragacanth gum has a singlet (857 [cm.sup.-1]).
Thus, dispersion of 50% enzyme with 50% MCC, DCP, carrageenan, agar, or tragacanth was prepared in phosphate buffer (pH 6.0) and the enzyme activity was detected and compared with reference.
Arunachalam, "Green fabrication of silver nanoparticles by gum tragacanth (Astragalus gummifer): a dual functional reductant and stabilizer," Journal of Nanomaterials, vol.
Drug suspension was made by suspending the root powder in 5 mL of 2% gum tragacanth suspension.
Group 1 and 2 served as normal and diabetic control respectively and were administered orally 20 ml of 2% aqueous gum tragacanth solution.
Various types of polymers are used as rheology control agents such as CMC, methylcellulose, NaCMC, PVP, xanthan gum [6, 9-11], poloxamer [12], tragacanth [13], chitosan [6], and Veegum [14].
Specific examples of film forming polymers that have been used for OS involve Pullulan, Hydroxy Propyl Methyl Cellulose (HPMC), Hydroxy Ethyl Cellulose (HEC), Povidone K-90, Xanthan gum, Tragacanth gum, Guar gum, Acacia gum, Arabic gum, methyl methacrylic copolymer, carboxyvinyl copolymer, or combinations thereof.
In his article, "Bitkilerle Tedavinin Tehlikeli YE-zE-" (Dangerous Sides of Treatment with Herbs) on the website Sycak GE-ndem, Erciyes University Associate Professor Ali Kandemir notes that there are nearly 450 types of tragacanth, 250 kinds of mullein and 90 species of sage tea.
They were prepared by cutting the colocynth to a small size, and reducing it to a fine powder in a mortar, rubbed with oil of sweet almonds; adding gum tragacanth, and mastic afterwards.
From beneath the tragacanth tree My soul, like the feather of a paddy
Exposure Applied stretch time Drying of Oven #1 110[degrees]C 145 Varied for cord dipped fabric seconds properties Heat treating Oven #2 225[degrees]C 90 Varied for cord seconds properties Table 4--typical two-step RFL dip formulations for PET treatment Subcoat: Water 84.2 Blocked isocyanate (50%) 7.0 Glycerol polyglycidyl ether 1.4 Sodium dioctyl sulfosuccinate (2.2%) 5.4 Gum tragacanth (2%) 2.0 Total parts 100 Total % solids 5 RFL top coat: Water 176.2 Sodium hydroxide (50%) 0.9 Penacolite resin R-2170 16.8 Formaldehyde (37%) 12.2 SBR/VP latex (41%) 244.0 Water 84.2 Total 534.3 F/R molar ratio 2.0 Total solids, % 22.0 Table 5--typical treatment parameters for PET Function Heat zone Temp.